Hi Stuart,
> -----Original Message----- > From: Stuart Yoder [mailto:stuart.yo...@nxp.com] > Sent: Monday, February 22, 2016 11:26 PM > To: u-boot@lists.denx.de > Cc: york sun <york....@nxp.com>; Prabhakar Kushwaha > <prabhakar.kushw...@nxp.com>; Mingkai Hu <mingkai...@nxp.com>; > Minghuan Lian <minghuan.l...@nxp.com>; Yang-Leo Li <leoyang...@nxp.com>; > marc.zyng...@arm.com; Stuart Yoder <stuart.yo...@nxp.com> > Subject: [PATCH 7/7] pci/layerscape: set LUT and msi-map for discovered PCI > devices > > From: Stuart Yoder <stuart.yo...@nxp.com> > > for all PCI devices discovered in a system: > -allocate a LUT (look-up-table) entry in that PCI controller > -allocate a stream ID for the device > -program and enable a LUT entry (maps PCI requester id to stream ID) > -set the msi-map property on the controller reflecting the > LUT mapping > > basic bus scanning loop/logic was taken from drivers/pci/pci.c > pci_hose_scan_bus(). > > Signed-off-by: Stuart Yoder <stuart.yo...@nxp.com> > --- > drivers/pci/pcie_layerscape.c | 68 > +++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 68 insertions(+) > > diff --git a/drivers/pci/pcie_layerscape.c b/drivers/pci/pcie_layerscape.c > index > dfafaf2..eaac9e1 100644 > --- a/drivers/pci/pcie_layerscape.c > +++ b/drivers/pci/pcie_layerscape.c > @@ -569,6 +569,70 @@ static void fdt_pcie_set_msi_map_entry(void *blob, > struct ls_pcie *pcie, > fdt_appendprop_u32(blob, nodeoffset, "msi-map", 1); } > > +static void fdt_fixup_pcie(void *blob) > +{ > + unsigned int found_multi = 0; > + unsigned char header_type; > + int index; > + u32 streamid; > + pci_dev_t dev; > + int bus; > + unsigned short id; > + struct pci_controller *hose; > + struct ls_pcie *pcie; > + int i; > + > + for (i = 0, hose = pci_get_hose_head(); hose; hose = hose->next, i++) { > + pcie = hose->priv_data; > + for (bus = hose->first_busno; bus <= hose->last_busno; bus++) { > + > + for (dev = PCI_BDF(bus, 0, 0); > + dev < PCI_BDF(bus, PCI_MAX_PCI_DEVICES - 1, > + PCI_MAX_PCI_FUNCTIONS - 1); > + dev += PCI_BDF(0, 0, 1)) { > + > + /* skip the host bridge */ > + if (dev == PCI_BDF(0, 0, 0)) > + continue; [Lian Minghuan-B31939] PCIe controller also needs a stream ID. It may request a MSI for AER PME hotplug service. > + > + if (PCI_FUNC(dev) && !found_multi) > + continue; > + > + pci_read_config_word(dev, PCI_VENDOR_ID, &id); > + > + pci_read_config_byte(dev, PCI_HEADER_TYPE, > + &header_type); > + > + if ((id == 0xFFFF) || (id == 0x0000)) > + continue; > + > + if (!PCI_FUNC(dev)) > + found_multi = header_type & 0x80; > + > + streamid = ls_pcie_next_streamid(); > + if (streamid < 0) { > + printf("ERROR: no stream ids free\n"); > + continue; > + } > + > + index = ls_pcie_next_lut_index(pcie); > + if (index < 0) { > + printf("ERROR: no LUT indexes free\n"); > + continue; > + } > + > + /* map PCI b.d.f to streamID in LUT */ > + ls_pcie_lut_set_mapping(pcie, index, dev >> 8, > + streamid); > + > + /* update msi-map in device tree */ > + fdt_pcie_set_msi_map_entry(blob, pcie, dev >> 8, > + streamid); > + } > + } > + } > +} > + > int ls_pcie_init_ctrl(int busno, enum srds_prtcl dev, struct ls_pcie_info > *info) > { > struct ls_pcie *pcie; > @@ -745,6 +809,10 @@ void ft_pci_setup(void *blob, bd_t *bd) > #ifdef CONFIG_PCIE4 > ft_pcie_ls_setup(blob, FSL_PCIE_COMPAT, CONFIG_SYS_PCIE4_ADDR, > PCIE4); > #endif > + > + #if defined(CONFIG_LS2080A) || defined(CONFIG_LS2085A) > + fdt_fixup_pcie(blob); > + #endif > } > > #else > -- > 1.7.9.5 _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
